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<h3>PREDOM: Predominance Area Diagrams</h3>

<h3>Format of the Input Data-File</h3>

<p><a href="SP_Data_File_Format.htm">Format of Input Data-Files</a>:
Input files consist of: <nobr><b>1)</b></nobr> definition of the
<a href="SP_Data_File_Chemical_System.htm">chemical system</a>;
<nobr><b>2)</b></nobr> <b>plot information;</b> and
<nobr><b>3)</b></nobr> <a href="SP_Data_File_Concs.htm">concentrations</a>
(ranges) for the chemical
<nobr>components<a href="#Note">*</a>.</nobr></p>

<p>The <b>plot information</b> for <b>PREDOM</b> is as follows:</p>
<p style="margin-left:1em; margin-top:0;">
    <nobr>[EH,]</nobr>  <nobr>[ONE AREA, NAME,]</nobr><br>
		  YCOMP,  XCOMP,  MCOMP,</p>

<p class="cont">where data within [] are optional.</p>
<p style="margin-left:1em;">
YCOMP, XCOMP = names for components with concentration in the Y-axis and X-axis,
  	respectively.</p>
<p style="margin-left:1em;">
MCOMP = name for the central component (the component for which the
		predominance areas will be calculated).</p>

<p>If before YCOMP, the text <nobr>&#147;ONE AREA,&#148;</nobr> is found,
the name of a species is read next, and the diagram will only show the
predominance area for that species.</p>

<p>If before YCOMP, the text <nobr>&#147;EH,&#148;</nobr> is found,
the redox potential (instead of <a href="1_Eh_pe.htm">pe</a>) is displayed.</p>

<p>A list of possible diagram types may be obtained from PREDOM by entering a
<nobr>&#147;?&#148;</nobr> in the plot-definition input line,
and running the program: this will make PREDOM complain that <nobr>&#147;?&#148;</nobr>
is not a correct diagram type, and the program will print a list of choices for the
plot definition.</p>

<p>Several input file <a href="Tut_Example_Files.htm">examples</a> may be found in
subdirectory <nobr>&#147;.\EXAMPLES&#148;.</nobr></p>

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<a name="Note"></a>
<p class="cont"><b><i>* Note:</i></b> the concentration type &#147;TV&#148;
<nobr>(<b>T</b>otal</nobr> concentration <nobr><b>V</b>aried)</nobr> can not be
given for PREDOM. Use instead &#147;LTV&#148; <nobr>(<b>L</b>og(<b>T</b>otal
concentration)</nobr>
<nobr><b>V</b>aried).</nobr>
</p>

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